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138. The worthy process for rapid protoyping

Product design infatuation was clearly part of our marriage vows, along with brewing strong coffee, making souffle, and having and holding until the end. But when Formula 1 starts using a new method of rapid prototyping in metal, well, the pairing of the two topics seems almost cause for a celebration where I live, or at least a multi-hour discussion of the method's potential over dinner with our equally obsessive friends.

Metal parts without machining, casting or tooling! Parts that are functionally production tooling durability and can be used for testing, assembly trials and final design validation!? I imagine this technology having a similar impact to when stereolithography (SLA) took off. Only in this case, the parts are durable, with finishing could emulate a final manufactured part, and can have details that were never possible with conventional fabrication methods. Just to be 100% clear, they are putting these prototype parts in actual cars and using them to test.

For comparison, consider nylon sintering, called "Selective Laser Sintering"(SLS), if you are familiar with that approach. SLS for prototyping plastic molding parts has been around a bit longer and is a lot more accessible than metal sintering in terms of availability and cost. Nylon sintering makes durable parts, but the parts are hard to finish relative to an SLA, for example, which can be easily sanded. Metal laser sintering, on the other hand, is made with much finer layers than its nylon cousin, which means it has a nicer surface to begin with, has greater strength in the z-axis, and—with finishing— is as cosmetically beautiful as a "real" part.